Room-temperature superconductor
A room-temperature superconductor is a material that is capable of exhibiting superconductivity at operating temperatures above 0 °C (273 K; 32 °F). While this is not strictly "room temperature", which would be approximately 20–25 °C (68–77 °F), it is the temperature at which ice forms, and can be reached and easily maintained in an everyday environment. As of 2019 the material with the highest accepted superconducting temperature is highly pressurized lanthanum decahydride (LaH10), whose transition temperature is 250 K (−23 °C). Previously the record was held by hydrogen sulfide, which has demonstrated superconductivity under high pressure at temperatures as high as 203 K (−70 °C).